private static void TestCursor <TEntry, T>(
Func <DoubleEntry[], TEntry[]> convert,
Func <TEntry, T> getValue,
Func <TEntry[], IColumnCursor <T> > factory,
T defaultValue = default(T))
where T : struct
{
const int iterations = 5;
var chunk = new DoubleEntry[0]
.Add(0, 12.2)
.Add(4, 15.2)
.Add(5, 16.2)
.Add(6, 13.2)
.Add(7, 14.2);
var convertedChunk = convert(chunk);
var cursor = factory(convertedChunk);
// Test MoveNext
for (var i = 0; i < iterations; i++)
{
Assert.AreEqual(getValue(convertedChunk[0]), cursor.GetNext(0));
Assert.AreEqual(getValue(convertedChunk[0]), cursor.GetNext(1));
Assert.AreEqual(getValue(convertedChunk[0]), cursor.GetNext(2));
Assert.AreEqual(getValue(convertedChunk[1]), cursor.GetNext(4));
Assert.AreEqual(getValue(convertedChunk[2]), cursor.GetNext(5));
Assert.AreEqual(getValue(convertedChunk[3]), cursor.GetNext(6));
Assert.AreEqual(getValue(convertedChunk[4]), cursor.GetNext(7));
Assert.AreEqual(getValue(convertedChunk[4]), cursor.GetNext(8));
Assert.AreEqual(getValue(convertedChunk[4]), cursor.GetNext(9));
cursor.Reset();
}
cursor.Dispose();
chunk.Set(0, 1, 12.2);
cursor = factory(convert(chunk));
for (var i = 0; i < iterations; i++)
{
Assert.AreEqual(defaultValue, cursor.GetNext(0));
Assert.AreEqual(getValue(convertedChunk[0]), cursor.GetNext(1));
Assert.AreEqual(getValue(convertedChunk[3]), cursor.GetNext(6));
Assert.AreEqual(getValue(convertedChunk[4]), cursor.GetNext(7));
cursor.Reset();
}
cursor.Dispose();
}